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XML to Improve File-Upload Processing
3149
XML to Improve File-Upload Processing
http://www.15seconds.com/Issue/010522.htm
This solution presents several limitations both on the client and server side. We must use the POST method (because the GET can't manage this type of data), and we have no solutions to trigger a POST processing without using an HTML form. When we send data to the TargetURL, the browser loads this page as the new current page and we have an undesirable "context switch."
The ENCTYPE property defines the Multipurpose Internet Mail Extensions (MIME) encoding for the form and must be set to "multipart/form-data" for file upload forms. When we set this property to "multipart/form-data" we obtain a different structure of the POST buffer (which is also more complex) and the Request ASP object can't access the form contents. Therefore, we can read the POST buffer using the Request.binaryRead method, but we can't use scripting languages to do this. The Request.binaryRead method returns a VTarray (which is a variant array of unsigned one byte characters) while scripting languages can manage only variant variables. We can resolve this problem only by using a specific, custom ASP component or ISAPI extension, such as CPSHOST.DLL. This behavior is by design. ASP > Tips and Tutorials > XML and ASP Oct 10, 2006
The ENCTYPE property defines the Multipurpose Internet Mail Extensions (MIME) encoding for the form and must be set to "multipart/form-data" for file upload forms. When we set this property to "multipart/form-data" we obtain a different structure of the POST buffer (which is also more complex) and the Request ASP object can't access the form contents. Therefore, we can read the POST buffer using the Request.binaryRead method, but we can't use scripting languages to do this. The Request.binaryRead method returns a VTarray (which is a variant array of unsigned one byte characters) while scripting languages can manage only variant variables. We can resolve this problem only by using a specific, custom ASP component or ISAPI extension, such as CPSHOST.DLL. This behavior is by design. ASP > Tips and Tutorials > XML and ASP Oct 10, 2006
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If you want to generate a datagrid (figure 1) that will display and navigate through the plants information, simple procedure to accomplish this in ASP will be as follows:
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XML stands for Extensible Markup Language. XML can be used in many ways and one of which is 'data storage'. This is the one we will be exploring in this article. XML along with XSL ( Extensible Stylesheet Language ) can by used to present data on the web pages. XML provides the data and XSL allows us to present it the way we want. Remember though that not all browsers support XML on the client side, only Micrsoft Internet Explorer 5.0 and above support XML. XML can also be used to perform RPC ( Remote Procedure Call ). Actually this capability of XML to allow communication between distant applications is so strong that Microsoft has developed SOAP ( Simple Object Access Protocol ) specification which uses XML to allow communication between remote applications. XML can be used for a lot more purposes which I haven't mentioned here. Also keep in mind that Microsoft's future .NET platform will make use of XML even more than any tool does today. ASP+, ADO+ and others will use XML to define and present data. So if you are comfortable with XML today, it will help you in the near future when you will be getting yourself ready to develop applications in the revolutionary platform called Microsoft .NET.
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This is first of a series of 3 articles that I will write to illustrate the use of XML as Data Source. I have divided this tutorial into 3 chunks. After this tutorial, you will be able to manipulate and play with XML Data files in the same way as you do with MS Access. In addition to that, there are certain advantages of using XML, over MS Access. I introduce these advantages in the text, as we proceed on. The article has been organized in the increasing order of difficulty.
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RSS files can be generated using Active Server Pages (ASP). It is OK for an RSS file to have a .asp suffix. In this example an RSS 0.91 file is generated, but it could easily be applied to other RSS versions. Similarly in this case the site stores its articles in a Microsoft Access database, but the database connection could be changed to reflect a Microsoft SQL Server database.
You can follow the example below or if you prefer you can download it in a text file here. You may get an XML error when you try and open the text file, just view source to get the code
You can follow the example below or if you prefer you can download it in a text file here. You may get an XML error when you try and open the text file, just view source to get the code
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